全文获取类型
收费全文 | 16593篇 |
免费 | 429篇 |
专业分类
财政金融 | 3260篇 |
工业经济 | 1146篇 |
计划管理 | 2803篇 |
经济学 | 3753篇 |
综合类 | 182篇 |
运输经济 | 164篇 |
旅游经济 | 303篇 |
贸易经济 | 2812篇 |
农业经济 | 695篇 |
经济概况 | 1888篇 |
信息产业经济 | 2篇 |
邮电经济 | 14篇 |
出版年
2023年 | 115篇 |
2021年 | 137篇 |
2020年 | 286篇 |
2019年 | 381篇 |
2018年 | 541篇 |
2017年 | 566篇 |
2016年 | 494篇 |
2015年 | 286篇 |
2014年 | 459篇 |
2013年 | 2062篇 |
2012年 | 501篇 |
2011年 | 552篇 |
2010年 | 516篇 |
2009年 | 531篇 |
2008年 | 481篇 |
2007年 | 405篇 |
2006年 | 372篇 |
2005年 | 309篇 |
2004年 | 302篇 |
2003年 | 305篇 |
2002年 | 300篇 |
2001年 | 300篇 |
2000年 | 307篇 |
1999年 | 305篇 |
1998年 | 315篇 |
1997年 | 277篇 |
1996年 | 230篇 |
1995年 | 234篇 |
1994年 | 244篇 |
1993年 | 246篇 |
1992年 | 266篇 |
1991年 | 259篇 |
1990年 | 201篇 |
1989年 | 187篇 |
1988年 | 167篇 |
1987年 | 165篇 |
1986年 | 167篇 |
1985年 | 241篇 |
1984年 | 258篇 |
1983年 | 250篇 |
1982年 | 215篇 |
1981年 | 196篇 |
1980年 | 175篇 |
1979年 | 168篇 |
1978年 | 159篇 |
1977年 | 135篇 |
1976年 | 125篇 |
1975年 | 140篇 |
1974年 | 99篇 |
1973年 | 102篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
91.
92.
J. S. Nix 《Journal of Agricultural Economics》1990,41(3):265-291
The paper begins by recording Journal articles since 1952 of relevance to farming incomes and efficiency, and follows by reviewing the literature on measuring farmers' incomes and the problems entailed, including consideration of non-farming incomes and capital gains and their relevance to agricultural policy. Definitions of ‘profit’ in selected economic texts are then compared, together with attempts to measure ‘pure profit’ from farming. Suitable charges for management and interest are then determined and estimates made of net profits and losses from different types of farming in 1986/7 and 1987/8 for both average and ‘top’ farms. Real farming incomes and capital gains from land from 1938 to 1988 are then discussed. The paper concludes by summarising why the concept of profitability from farming has now largely lost its significance—though not for all farmers. 相似文献
93.
Increased AIDS mortality and other preexisting conditions have contributed to agricultural productivity declines in the districts of Masaka and Rakai in Uganda. These two districts were the most fertile in Uganda and also had the highest HIV seroprevalence rates in Africa. 66% of study households experienced land use decline to some extent over the past 5 years. The 11% decline in poultry production and 32% decline in cattle production was reportedly due to poor management and loss of grazing land from overpopulation and larger scale farms. The most frequently reported reasons for crop reductions were death and sickness; these was estimated as affecting 8% of families with children under 5 years in the study area. Morbidity and mortality as a reason for the decline was reported two times as much as poverty and decline in international coffee prices. Other reasons for loss of productivity were food shortages and insecurity, loss of income, and reduced ability to respond to educational and medical needs. Cassava is replacing the culturally preferred matooke banana as a crop that is more disease-, pest-, and drought resistant. The banana weevil has been a recent problem. Marginal farming systems have been the most affected by declines in land use and livestock production, but fertile areas have not been spared the impact from AIDS and adult mortality. Poverty has decreased the use of pesticides, herbicides, and fertilizers in the districts. Policy has had an impact on agricultural practices: population growth and inheritance have added to loss of individual land holdings and contributed to fallow periods and infertility. Appropriate land management practices have not been adequately promoted in the agricultural extension service. Civil wars and the drop in coffee prices have reduced the number of farm laborers. Common grazing land has been turned over to large commercial ranches. Government should maintain research and monitoring of declines in food and cash crop production and manpower needs. Policy must be designed to respond to the complicated factors affecting productivity. High AIDS prevalence areas and marginal areas where reduced production effects would be the most severe must be given priority status. Development of cash crop alternatives must be examined and perhaps supported on an experimental basis by donor agencies. Maximum productivity should be encouraged by rural extension and education agencies. A number of other specific recommendations were made for individual survival strategies to maintain high agricultural productivity. 相似文献
94.
The North American Waterfowl Management Plan seeks to improve wildlife habitat and increase waterfowl numbers through voluntary transactions with farmers to modify their land management practices. The impact of modified land use practices on the incomes of participating farmers and the regional economy are estimated. The compensation offered under the Plan for modification of land use is determined to adequately offset any loss in participants' income. Income losses to the community due to reduced farm input sales were more than offset by the increase in NAWMP direct expenditures (excluding compensation payments). Distributional effects and externalities must be recognized and monitored to ensure success of the program 相似文献
95.
96.
Helga Kristjánsdóttir 《Scottish journal of political economy》2010,57(5):591-614
This research looks at how foreign direct investment (FDI) in a small open economy compares with that of larger countries. I apply several specifications of the knowledge‐capital model to unique FDI data from the isolated country of Iceland, allowing for comparison with previous analysis of larger and similarly open economies. Using this together with other techniques, I seek to explain investment determinants by geography, economic size and skilled labor availability. The results of these analysis show that popular specifications do not accurately predict the effects for a small country case. 相似文献
97.
>S. N. Broadberry 《Scottish journal of political economy》1997,44(4):403-424
This paper examines Britain's long run growth and productivity performance since the late nineteenth century, taking an international comparative perspective and disaggregating by sector. Britain was richer than the United States and Germany in 1870 largely because of high levels of labour productivity in services and agriculture rather than in industry, together with a highly favourable structure, particularly a small share of the labour force in agriculture. By 1990, the productivity gap in manufacturing had not grown bigger. Rather, the deterioration in Britain's overall comparative labour productivity position has been concentrated in services and agriculture, together with the effects of structural change, particularly the later shift of labour out of agriculture in the United States and Germany. 相似文献
98.
Jordan H. Rhodes Thomas C. Buchmueller Helen G. Levy Sayeh S. Nikpay 《Contemporary economic policy》2020,38(1):81-93
This study examines the effect of the Affordable Care Act's Medicaid expansion on hospital financial outcomes. A key innovation relative to prior studies is that we explicitly account for heterogeneity across states in the timing and extent of the expansion as well as across hospital types. We find that Medicaid expansion led to a decrease in uncompensated care expenditures and an increase in average operating margins. The effects were larger in states where the Medicaid expansion led to a greater increase in program eligibility. Operating margins improved most for public hospitals and facilities located in rural areas. (JEL I11, I13, I18) 相似文献
99.
Gábor Virág 《Economic Theory》2013,52(1):129-163
We study first-price auctions with resale when there are many bidders and derive existence and characterization results under the assumption that the winner of the initial auction runs a second-price auction with an optimal reserve price. The fact that symmetrization fails when there are more than two bidders has been observed before, but we also provide the direction: weaker bidders are less likely to win than stronger ones. For a special class of distributions and three bidders, we prove that the bid distributions are more symmetric with resale than without. Numerical simulations suggest that the more bidders there are, the more similar the allocation is to the case without resale, and thus, the more asymmetric the bid distributions are between strong and weak bidders. We also show in an example that the revenue advantage of first-price auctions over second-price auctions is positive, but decreasing in the number of bidders. 相似文献
100.
Much research is needed to determine the extent to which the high school social studies curriculum, and certain courses within that curriculum, contribute toward economic understanding. Boddy and Tocco report on their attempt to assess the social studies curriculum in Southwest Florida. They also single out one required course, Americanism vs. Communism, which was designed to “emphasize the free-enterprise-competitive economy of the United States,” and measure its impact on a sample of high school seniors. The findings are not encouraging. Although this study applies to one limited geographic area, others may find it interesting because it suggests the need for similar research in other parts of the nation. 相似文献